Improvement in circular-saw mills



AQ'TALBOTT.

Improvement in Circular-Saw Mills.

Patented June1 1,1872-.

Wtuwm 7. RM- FHDVU-UTHOGRAFH/D 67. N. If KUSBURNI S PROCESS) UNITEDSTATES ALLAN TALBOTT, OF RICHMOND,

VIRGINIA.

IMPROVEMENT IN CIRCULAR-SAW MILLS.

Specification forming part of Letters Patent No. 127,936, dated June 11,1872.

Specification describing certain Improvements in Means for Feeding Upand Gigging Back the Log-Carriage of Circular-Saw Mills, invented byALLAN TALBOTT, of Richmond, in the county of Henrico and State ofVirginia.

My invention consists in an improvement in means for feeding up andgigging back the log-carriage of'circular-saw mills, as hereinafterfully described, and subsequently pointed out in the claim.

Figure l is a side view, partly in section. Fig. 2 is a top View.

A represents a saw-mill frame; B, a sawshaft; and bits adjustablepillow-blocks; G, a carriage-shaft, 0, its bearings; J, a spurpinion,which works in a rack onthe carriage, and moves it to and from the saw.M is a wheel, which has a friction-surface on the inside and outside ofrim. D is a feed-shaft; d and f its pivot bearings; K, a friction-feedpulley; and G a cone-pulley, which is driven by cone-pulley F. E is abacking-shaft; g and '72, its pivot-bearings; L, a frictionbackingpulley; and I, a pulley which is driven by pulley H. The stand aof bearings f and h are bolted stationary to the frame A. The stand a ofbearings (Z and g slide in the shoes I, thus allowing thefriction-pulleys K and L to slide in and out of contact with thesurfaces of the friction-wheel M. S is a screw or Worm. W is a segmentof a worm-wheel, which turns upon the pivot 00. R and T are rods whichconnect the sliding stands a of bearings d and g with the worm-wheel Wat g and 2. V is a shaft to which worm S is attached, and extends toeach end of the mill.

The saw-shaft B being in motion, the feed and backing shafts D and E arealso in motion, and when the worm-wheel W is standing perpendicularneither of the friction-pulleys K and L are in contact with the insideand outside surfaces of the friction-wheel M and the shaft G istherefore stationary. By turning the hand-wheel P about an eighth of arevolution to the right, the top of the worm-wheel W is drawn back. Thismoves the frictionpulley L.further from the inside surface, and drawsthe friction-pulley K in contact with the outside surface of thefriction-wheel M, which sets the shaft 0 in motion, and moves thecarriage up to the saw. Turning the hand-wheel P to the left reversesthe worm-wheel W, moves the friction-pulley K from the outside surface,and draws the friction-pulley L in contact with the inside surface offrictionwheel M, which reverses the motion of shaft 0, and runs thecarriage back from the saw. The worm and worm-wheel S and W not onlysubserve for throwing the pulleys in and out of gear, but also act as aratchet for holding them in whatever position they may be placed,thereby dispensing with springs, catches, and other additionalcontrivances, which are apt to get out of reliable working order. Thesawyer is also enabled to control the carriage from either end of themill with equal facility.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The combination of inside and outside friction-wheel with frictionpulleys, worm, and worm-wheel, substantially as shown, and for thepurpose set forth.

ALLAN TALBOTT.

Witnesses:

CHAS. H. ,TALBoTT, MARGELLUS SMITH.

